Revert the timeline optimistic and pagination rework (#2596)

* Add npm release track invariant and beta dist-tag procedure

* Revert "Keep older chat history and image previews stable (#2490)"

The timeline optimistic/pagination rework needs more work than main releases can wait for. Reverted together with #2484; both are reapplied on integration/timeline-optimistic-rework.

* Revert "Stop completed turns from appearing stuck (#2484)"

See the #2490 revert. #2490 built on this submission-authority change, so the two revert and reapply as a pair.

packages/app/src/stores/create-flow-store.ts

@@ -109,10 +109,7 @@ export const useCreateFlowStore = create<CreateFlowState>((set) => ({
     set((state) => {
       const next = Object.fromEntries(
         Object.entries(state.pendingByDraftId).filter(
-          ([, pending]) =>
-            pending.lifecycle !== "sent" ||
-            pending.serverId !== serverId ||
-            pending.agentId !== agentId,
+          ([, pending]) => pending.serverId !== serverId || pending.agentId !== agentId,
         ),
       );
       if (Object.keys(next).length === Object.keys(state.pendingByDraftId).length) {